
\begin{table}
\caption{Robustness Check: Linear Regression Results for Attacks against Civilians in Civil Wars (Conditional on Regime Types of External State Supporters)}
\begin{center}
\scalebox{0.6}{
\begin{tabular}{l c c c c c c c c}
\toprule
 & \multicolumn{4}{c}{Unconditional models} & \multicolumn{4}{c}{Interaction models} \\
\cmidrule(lr){2-5} \cmidrule(lr){6-9}
 & Model 1 & Model 2 & Model 3 & Model 4 & Model 5 & Model 6 & Model 7 & Model 8 \\
\midrule
Lagged DV (Prop Attacks Against Civilians)                                 & $0.474^{***}$  & $0.474^{***}$  & $0.474^{***}$  & $0.469^{***}$  & $0.473^{***}$  & $0.474^{***}$  & $0.474^{***}$  & $0.468^{***}$  \\
                                                                           & $(0.009)$      & $(0.009)$      & $(0.009)$      & $(0.009)$      & $(0.009)$      & $(0.009)$      & $(0.009)$      & $(0.009)$      \\
Pro-Rebel Resolution                                                       & $-0.058^{***}$ & $-0.055^{***}$ & $-0.058^{***}$ & $-0.057^{***}$ & $-0.058^{***}$ & $-0.054^{***}$ & $-0.057^{***}$ & $-0.057^{***}$ \\
                                                                           & $(0.020)$      & $(0.020)$      & $(0.020)$      & $(0.020)$      & $(0.020)$      & $(0.020)$      & $(0.020)$      & $(0.020)$      \\
Pro-Government Resolution                                                  & $-0.036$       & $-0.037$       & $-0.040$       & $-0.041$       & $-0.037$       & $-0.037$       & $-0.040$       & $-0.043$       \\
                                                                           & $(0.045)$      & $(0.045)$      & $(0.045)$      & $(0.045)$      & $(0.045)$      & $(0.045)$      & $(0.045)$      & $(0.045)$      \\
Any Pro-Rebel Support                                                      & $-0.023^{*}$   &                &                &                & $-0.022$       &                &                &                \\
                                                                           & $(0.013)$      &                &                &                & $(0.019)$      &                &                &                \\
Any Pro-Government Support                                                 & $-0.020$       &                &                &                & $-0.064^{**}$  &                &                &                \\
                                                                           & $(0.013)$      &                &                &                & $(0.026)$      &                &                &                \\
Pro Reb Intervention, Troops                                               &                & $-0.111^{***}$ &                &                &                & $-0.114$       &                &                \\
                                                                           &                & $(0.034)$      &                &                &                & $(0.240)$      &                &                \\
Pro Gov Intervention, Troops                                               &                & $0.032^{*}$    &                &                &                & $-0.029$       &                &                \\
                                                                           &                & $(0.019)$      &                &                &                & $(0.034)$      &                &                \\
Pro Reb Intervention, Weapons                                              &                &                & $0.000$        &                &                &                & $-0.050^{*}$   &                \\
                                                                           &                &                & $(0.013)$      &                &                &                & $(0.029)$      &                \\
Pro Gov Intervention, Weapons                                              &                &                & $-0.042^{***}$ &                &                &                & $-0.122^{***}$ &                \\
                                                                           &                &                & $(0.014)$      &                &                &                & $(0.040)$      &                \\
Pro Reb Intervention, Economic                                             &                &                &                & $-0.093^{***}$ &                &                &                & $-0.038^{*}$   \\
                                                                           &                &                &                & $(0.013)$      &                &                &                & $(0.023)$      \\
Pro Gov Intervention, Economic                                             &                &                &                & $0.026^{*}$    &                &                &                & $0.022$        \\
                                                                           &                &                &                & $(0.015)$      &                &                &                & $(0.045)$      \\
Regime types of Pro Gov supporters                                         & $0.001$        & $-0.001$       & $0.002$        & $-0.003$       & $-0.001$       & $-0.003$       & $0.000$        & $-0.002$       \\
                                                                           & $(0.004)$      & $(0.004)$      & $(0.004)$      & $(0.004)$      & $(0.005)$      & $(0.004)$      & $(0.004)$      & $(0.004)$      \\
Regime types of Pro Reb supporters                                         & $-0.007$       & $-0.009$       & $-0.007$       & $-0.008$       & $-0.007$       & $-0.009$       & $-0.010$       & $-0.003$       \\
                                                                           & $(0.006)$      & $(0.006)$      & $(0.006)$      & $(0.006)$      & $(0.006)$      & $(0.006)$      & $(0.006)$      & $(0.006)$      \\
Any Pro-Rebel Support $\times$ Regime types of Pro Reb supporters          &                &                &                &                & $0.004$        &                &                &                \\
                                                                           &                &                &                &                & $(0.018)$      &                &                &                \\
Any Pro-Government Support $\times$ Regime types of Pro Gov supporters     &                &                &                &                & $0.036^{*}$    &                &                &                \\
                                                                           &                &                &                &                & $(0.019)$      &                &                &                \\
Pro Reb Intervention, Troops $\times$ Regime types of Pro Reb supporters   &                &                &                &                &                & $0.017$        &                &                \\
                                                                           &                &                &                &                &                & $(0.241)$      &                &                \\
Pro Gov Intervention, Troops $\times$ Regime types of Pro Gov supporters   &                &                &                &                &                & $0.058^{**}$   &                &                \\
                                                                           &                &                &                &                &                & $(0.027)$      &                &                \\
Pro Reb Intervention, Weapons $\times$ Regime types of Pro Reb supporters  &                &                &                &                &                &                & $0.064^{**}$   &                \\
                                                                           &                &                &                &                &                &                & $(0.028)$      &                \\
Pro Gov Intervention, Weapons $\times$ Regime types of Pro Gov supporters  &                &                &                &                &                &                & $0.059^{**}$   &                \\
                                                                           &                &                &                &                &                &                & $(0.029)$      &                \\
Pro Reb Intervention, Economic $\times$ Regime types of Pro Reb supporters &                &                &                &                &                &                &                & $-0.070^{***}$ \\
                                                                           &                &                &                &                &                &                &                & $(0.024)$      \\
Pro Gov Intervention, Economic $\times$ Regime types of Pro Gov supporters &                &                &                &                &                &                &                & $-0.000$       \\
                                                                           &                &                &                &                &                &                &                & $(0.033)$      \\
Previous Pro Reb Res,Count                                                 & $0.001^{***}$  & $0.001^{***}$  & $0.001^{***}$  & $0.001^{***}$  & $0.001^{***}$  & $0.001^{***}$  & $0.001^{***}$  & $0.001^{***}$  \\
                                                                           & $(0.000)$      & $(0.000)$      & $(0.000)$      & $(0.000)$      & $(0.000)$      & $(0.000)$      & $(0.000)$      & $(0.000)$      \\
Previous Pro Gov Res,Count                                                 & $0.010^{***}$  & $0.006^{**}$   & $0.009^{***}$  & $0.008^{***}$  & $0.008^{***}$  & $0.002$        & $0.008^{***}$  & $0.008^{***}$  \\
                                                                           & $(0.002)$      & $(0.003)$      & $(0.002)$      & $(0.002)$      & $(0.002)$      & $(0.003)$      & $(0.002)$      & $(0.002)$      \\
Physical Integrity Rights                                                  & $-0.012^{***}$ & $-0.012^{***}$ & $-0.012^{***}$ & $-0.013^{***}$ & $-0.012^{***}$ & $-0.013^{***}$ & $-0.012^{***}$ & $-0.013^{***}$ \\
                                                                           & $(0.002)$      & $(0.002)$      & $(0.002)$      & $(0.002)$      & $(0.002)$      & $(0.002)$      & $(0.002)$      & $(0.002)$      \\
Logged GDP per capita                                                      & $0.042^{***}$  & $0.046^{***}$  & $0.044^{***}$  & $0.043^{***}$  & $0.042^{***}$  & $0.047^{***}$  & $0.043^{***}$  & $0.043^{***}$  \\
                                                                           & $(0.003)$      & $(0.003)$      & $(0.003)$      & $(0.003)$      & $(0.003)$      & $(0.003)$      & $(0.003)$      & $(0.003)$      \\
Logged Population                                                          & $0.033^{***}$  & $0.034^{***}$  & $0.034^{***}$  & $0.033^{***}$  & $0.033^{***}$  & $0.033^{***}$  & $0.034^{***}$  & $0.033^{***}$  \\
                                                                           & $(0.003)$      & $(0.003)$      & $(0.003)$      & $(0.003)$      & $(0.003)$      & $(0.003)$      & $(0.003)$      & $(0.003)$      \\
Rebel Strength                                                             & $0.035^{***}$  & $0.031^{***}$  & $0.036^{***}$  & $0.032^{***}$  & $0.037^{***}$  & $0.032^{***}$  & $0.037^{***}$  & $0.032^{***}$  \\
                                                                           & $(0.008)$      & $(0.008)$      & $(0.008)$      & $(0.008)$      & $(0.008)$      & $(0.008)$      & $(0.008)$      & $(0.008)$      \\
Cold War                                                                   & $-0.015^{**}$  & $-0.017^{**}$  & $-0.012$       & $-0.013^{*}$   & $-0.014^{*}$   & $-0.018^{**}$  & $-0.011$       & $-0.012$       \\
                                                                           & $(0.007)$      & $(0.007)$      & $(0.008)$      & $(0.007)$      & $(0.007)$      & $(0.007)$      & $(0.008)$      & $(0.007)$      \\
Count of Rebel Groups                                                      & $0.020^{***}$  & $0.019^{***}$  & $0.021^{***}$  & $0.017^{***}$  & $0.020^{***}$  & $0.018^{***}$  & $0.020^{***}$  & $0.018^{***}$  \\
                                                                           & $(0.005)$      & $(0.005)$      & $(0.005)$      & $(0.005)$      & $(0.005)$      & $(0.005)$      & $(0.005)$      & $(0.005)$      \\
Conflict Duration                                                          & $0.000^{*}$    & $0.000^{*}$    & $0.000^{*}$    & $0.000^{***}$  & $0.000^{*}$    & $0.000^{**}$   & $0.000^{**}$   & $0.000^{***}$  \\
                                                                           & $(0.000)$      & $(0.000)$      & $(0.000)$      & $(0.000)$      & $(0.000)$      & $(0.000)$      & $(0.000)$      & $(0.000)$      \\
Intercept                                                                  & $-0.590^{***}$ & $-0.634^{***}$ & $-0.629^{***}$ & $-0.589^{***}$ & $-0.580^{***}$ & $-0.618^{***}$ & $-0.617^{***}$ & $-0.600^{***}$ \\
                                                                           & $(0.058)$      & $(0.057)$      & $(0.057)$      & $(0.057)$      & $(0.058)$      & $(0.057)$      & $(0.057)$      & $(0.057)$      \\
\midrule
R$^2$                                                                      & $0.332$        & $0.332$        & $0.332$        & $0.335$        & $0.333$        & $0.333$        & $0.333$        & $0.335$        \\
Adj. R$^2$                                                                 & $0.331$        & $0.331$        & $0.331$        & $0.334$        & $0.332$        & $0.331$        & $0.332$        & $0.334$        \\
Num. obs.                                                                  & $10222$        & $10222$        & $10222$        & $10222$        & $10222$        & $10222$        & $10222$        & $10222$        \\
\bottomrule
\multicolumn{9}{l}{\scriptsize{$^{***}p<0.01$; $^{**}p<0.05$; $^{*}p<0.1$}}
\end{tabular}
}
\label{tab:regime}
\end{center}
\end{table}
